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Rearranging Formulae

Revise Rearranging Formulae in Algebra for GCSE Mathematics with 14 exam-style questions and 11 flashcards. This is a high-frequency exam topic, so students should expect to explain it clearly under timed conditions.

Study this topic

1

Making a Letter the Star

Introduction2

The Method: Reverse BIDMAS

Deep Dive3

Worked Example 1: Linear

Notes4

Worked Example 2: With a Square

Notes5

Worked Example 3: Subject Appears Twice (Higher)

Notes

Sample Flashcards

What is the 'subject' of a formula?
The variable that stands alone on one side of the equals sign. In v = u + at, v is the subject.
What does 'rearranging a formula' produce?
An equivalent formula expressing a different variable as the subject. E.g. v = u + at rearranges to a = (v − u)/t.

Sample Questions

Make b the subject of the formula: a = b + c

  • A. b = a + c
  • B. b = c − a
  • C. b = a − c
  • D. b = ac
1 markfoundation

The circumference of a circle is given by the formula: C = 2πr Make r the subject of the formula.

2 marksfoundation

14

exam-style questions

11

revision flashcards

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